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Commit | Line | Data |
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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
d0e94d17 | 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 19 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 20 | */ |
eb335bc4 HJ |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
5654e932 | 23 | #include <linux/kernel.h> |
0c3b7b2f S |
24 | #include <linux/sched.h> |
25 | #include <linux/wait.h> | |
0ffa63b0 | 26 | #include <linux/mm.h> |
b4362c9c | 27 | #include <linux/delay.h> |
21a80820 | 28 | #include <linux/io.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
3f335ea2 S |
30 | |
31 | #include "hyperv.h" | |
5ca7252a | 32 | #include "hyperv_net.h" |
fceaf24a HJ |
33 | |
34 | ||
5a71ae30 | 35 | static struct netvsc_device *alloc_net_device(struct hv_device *device) |
fceaf24a | 36 | { |
85799a37 | 37 | struct netvsc_device *net_device; |
fceaf24a | 38 | |
85799a37 HZ |
39 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
40 | if (!net_device) | |
fceaf24a HJ |
41 | return NULL; |
42 | ||
454f18a9 | 43 | /* Set to 2 to allow both inbound and outbound traffic */ |
509ee387 | 44 | atomic_set(&net_device->refcnt, 2); |
fceaf24a | 45 | |
53d21fdb | 46 | net_device->dev = device; |
ca623ad3 | 47 | device->ext = net_device; |
fceaf24a | 48 | |
85799a37 | 49 | return net_device; |
fceaf24a HJ |
50 | } |
51 | ||
454f18a9 | 52 | /* Get the net device object iff exists and its refcount > 1 */ |
5a71ae30 | 53 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 54 | { |
85799a37 | 55 | struct netvsc_device *net_device; |
fceaf24a | 56 | |
ca623ad3 | 57 | net_device = device->ext; |
53d21fdb HZ |
58 | if (net_device && atomic_read(&net_device->refcnt) > 1) |
59 | atomic_inc(&net_device->refcnt); | |
fceaf24a | 60 | else |
85799a37 | 61 | net_device = NULL; |
fceaf24a | 62 | |
85799a37 | 63 | return net_device; |
fceaf24a HJ |
64 | } |
65 | ||
454f18a9 | 66 | /* Get the net device object iff exists and its refcount > 0 */ |
5a71ae30 | 67 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 68 | { |
85799a37 | 69 | struct netvsc_device *net_device; |
fceaf24a | 70 | |
ca623ad3 | 71 | net_device = device->ext; |
53d21fdb HZ |
72 | if (net_device && atomic_read(&net_device->refcnt)) |
73 | atomic_inc(&net_device->refcnt); | |
fceaf24a | 74 | else |
85799a37 | 75 | net_device = NULL; |
fceaf24a | 76 | |
85799a37 | 77 | return net_device; |
fceaf24a HJ |
78 | } |
79 | ||
5a71ae30 | 80 | static void put_net_device(struct hv_device *device) |
fceaf24a | 81 | { |
85799a37 | 82 | struct netvsc_device *net_device; |
fceaf24a | 83 | |
ca623ad3 | 84 | net_device = device->ext; |
fceaf24a | 85 | |
53d21fdb | 86 | atomic_dec(&net_device->refcnt); |
fceaf24a HJ |
87 | } |
88 | ||
5a71ae30 HZ |
89 | static struct netvsc_device *release_outbound_net_device( |
90 | struct hv_device *device) | |
fceaf24a | 91 | { |
85799a37 | 92 | struct netvsc_device *net_device; |
fceaf24a | 93 | |
ca623ad3 | 94 | net_device = device->ext; |
85799a37 | 95 | if (net_device == NULL) |
fceaf24a HJ |
96 | return NULL; |
97 | ||
454f18a9 | 98 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
53d21fdb | 99 | while (atomic_cmpxchg(&net_device->refcnt, 2, 1) != 2) |
b4362c9c | 100 | udelay(100); |
fceaf24a | 101 | |
85799a37 | 102 | return net_device; |
fceaf24a HJ |
103 | } |
104 | ||
5a71ae30 HZ |
105 | static struct netvsc_device *release_inbound_net_device( |
106 | struct hv_device *device) | |
fceaf24a | 107 | { |
85799a37 | 108 | struct netvsc_device *net_device; |
fceaf24a | 109 | |
ca623ad3 | 110 | net_device = device->ext; |
85799a37 | 111 | if (net_device == NULL) |
fceaf24a HJ |
112 | return NULL; |
113 | ||
454f18a9 | 114 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
53d21fdb | 115 | while (atomic_cmpxchg(&net_device->refcnt, 1, 0) != 1) |
b4362c9c | 116 | udelay(100); |
fceaf24a | 117 | |
ca623ad3 | 118 | device->ext = NULL; |
85799a37 | 119 | return net_device; |
fceaf24a HJ |
120 | } |
121 | ||
ec91cd09 HZ |
122 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) |
123 | { | |
124 | struct nvsp_message *revoke_packet; | |
125 | int ret = 0; | |
126 | ||
127 | /* | |
128 | * If we got a section count, it means we received a | |
129 | * SendReceiveBufferComplete msg (ie sent | |
130 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
131 | * to send a revoke msg here | |
132 | */ | |
133 | if (net_device->recv_section_cnt) { | |
134 | /* Send the revoke receive buffer */ | |
135 | revoke_packet = &net_device->revoke_packet; | |
136 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
137 | ||
138 | revoke_packet->hdr.msg_type = | |
139 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
140 | revoke_packet->msg.v1_msg. | |
141 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
142 | ||
143 | ret = vmbus_sendpacket(net_device->dev->channel, | |
144 | revoke_packet, | |
145 | sizeof(struct nvsp_message), | |
146 | (unsigned long)revoke_packet, | |
147 | VM_PKT_DATA_INBAND, 0); | |
148 | /* | |
149 | * If we failed here, we might as well return and | |
150 | * have a leak rather than continue and a bugchk | |
151 | */ | |
152 | if (ret != 0) { | |
153 | dev_err(&net_device->dev->device, "unable to send " | |
154 | "revoke receive buffer to netvsp"); | |
a3e00530 | 155 | return ret; |
ec91cd09 HZ |
156 | } |
157 | } | |
158 | ||
159 | /* Teardown the gpadl on the vsp end */ | |
160 | if (net_device->recv_buf_gpadl_handle) { | |
161 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
162 | net_device->recv_buf_gpadl_handle); | |
163 | ||
164 | /* If we failed here, we might as well return and have a leak | |
165 | * rather than continue and a bugchk | |
166 | */ | |
167 | if (ret != 0) { | |
168 | dev_err(&net_device->dev->device, | |
169 | "unable to teardown receive buffer's gpadl"); | |
a3e00530 | 170 | return -ret; |
ec91cd09 HZ |
171 | } |
172 | net_device->recv_buf_gpadl_handle = 0; | |
173 | } | |
174 | ||
175 | if (net_device->recv_buf) { | |
176 | /* Free up the receive buffer */ | |
177 | free_pages((unsigned long)net_device->recv_buf, | |
178 | get_order(net_device->recv_buf_size)); | |
179 | net_device->recv_buf = NULL; | |
180 | } | |
181 | ||
182 | if (net_device->recv_section) { | |
183 | net_device->recv_section_cnt = 0; | |
184 | kfree(net_device->recv_section); | |
185 | net_device->recv_section = NULL; | |
186 | } | |
187 | ||
188 | return ret; | |
189 | } | |
190 | ||
5a71ae30 | 191 | static int netvsc_init_recv_buf(struct hv_device *device) |
fceaf24a | 192 | { |
21a80820 | 193 | int ret = 0; |
35abb21a | 194 | int t; |
85799a37 HZ |
195 | struct netvsc_device *net_device; |
196 | struct nvsp_message *init_packet; | |
fceaf24a | 197 | |
5a71ae30 | 198 | net_device = get_outbound_net_device(device); |
85799a37 | 199 | if (!net_device) { |
eb335bc4 | 200 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 201 | "device being destroyed?"); |
927bc33c | 202 | return -ENODEV; |
fceaf24a | 203 | } |
fceaf24a | 204 | |
53d21fdb | 205 | net_device->recv_buf = |
df3493e0 S |
206 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
207 | get_order(net_device->recv_buf_size)); | |
53d21fdb | 208 | if (!net_device->recv_buf) { |
eb335bc4 HJ |
209 | dev_err(&device->device, "unable to allocate receive " |
210 | "buffer of size %d", net_device->recv_buf_size); | |
927bc33c | 211 | ret = -ENOMEM; |
0c3b7b2f | 212 | goto cleanup; |
fceaf24a | 213 | } |
fceaf24a | 214 | |
454f18a9 BP |
215 | /* |
216 | * Establish the gpadl handle for this buffer on this | |
217 | * channel. Note: This call uses the vmbus connection rather | |
218 | * than the channel to establish the gpadl handle. | |
219 | */ | |
53d21fdb HZ |
220 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
221 | net_device->recv_buf_size, | |
222 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 223 | if (ret != 0) { |
eb335bc4 HJ |
224 | dev_err(&device->device, |
225 | "unable to establish receive buffer's gpadl"); | |
0c3b7b2f | 226 | goto cleanup; |
fceaf24a HJ |
227 | } |
228 | ||
fceaf24a | 229 | |
454f18a9 | 230 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 231 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 232 | |
85799a37 | 233 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 234 | |
53d21fdb HZ |
235 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
236 | init_packet->msg.v1_msg.send_recv_buf. | |
237 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
238 | init_packet->msg.v1_msg. | |
239 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 240 | |
454f18a9 | 241 | /* Send the gpadl notification request */ |
85799a37 | 242 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 243 | sizeof(struct nvsp_message), |
85799a37 | 244 | (unsigned long)init_packet, |
415f2287 | 245 | VM_PKT_DATA_INBAND, |
5a4df290 | 246 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 247 | if (ret != 0) { |
eb335bc4 HJ |
248 | dev_err(&device->device, |
249 | "unable to send receive buffer's gpadl to netvsp"); | |
0c3b7b2f | 250 | goto cleanup; |
fceaf24a HJ |
251 | } |
252 | ||
5c5781b3 | 253 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 254 | BUG_ON(t == 0); |
0c3b7b2f | 255 | |
fceaf24a | 256 | |
454f18a9 | 257 | /* Check the response */ |
53d21fdb HZ |
258 | if (init_packet->msg.v1_msg. |
259 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
eb335bc4 | 260 | dev_err(&device->device, "Unable to complete receive buffer " |
21a80820 | 261 | "initialzation with NetVsp - status %d", |
53d21fdb HZ |
262 | init_packet->msg.v1_msg. |
263 | send_recv_buf_complete.status); | |
927bc33c | 264 | ret = -EINVAL; |
0c3b7b2f | 265 | goto cleanup; |
fceaf24a HJ |
266 | } |
267 | ||
454f18a9 | 268 | /* Parse the response */ |
fceaf24a | 269 | |
53d21fdb HZ |
270 | net_device->recv_section_cnt = init_packet->msg. |
271 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 272 | |
53d21fdb | 273 | net_device->recv_section = kmalloc(net_device->recv_section_cnt |
85799a37 | 274 | * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); |
53d21fdb | 275 | if (net_device->recv_section == NULL) { |
927bc33c | 276 | ret = -EINVAL; |
0c3b7b2f | 277 | goto cleanup; |
fceaf24a HJ |
278 | } |
279 | ||
53d21fdb HZ |
280 | memcpy(net_device->recv_section, |
281 | init_packet->msg.v1_msg. | |
282 | send_recv_buf_complete.sections, | |
283 | net_device->recv_section_cnt * | |
85799a37 | 284 | sizeof(struct nvsp_1_receive_buffer_section)); |
fceaf24a | 285 | |
21a80820 GKH |
286 | /* |
287 | * For 1st release, there should only be 1 section that represents the | |
288 | * entire receive buffer | |
289 | */ | |
53d21fdb HZ |
290 | if (net_device->recv_section_cnt != 1 || |
291 | net_device->recv_section->offset != 0) { | |
927bc33c | 292 | ret = -EINVAL; |
0c3b7b2f | 293 | goto cleanup; |
fceaf24a HJ |
294 | } |
295 | ||
0c3b7b2f | 296 | goto exit; |
fceaf24a | 297 | |
0c3b7b2f | 298 | cleanup: |
5a71ae30 | 299 | netvsc_destroy_recv_buf(net_device); |
fceaf24a | 300 | |
0c3b7b2f | 301 | exit: |
5a71ae30 | 302 | put_net_device(device); |
fceaf24a HJ |
303 | return ret; |
304 | } | |
305 | ||
fceaf24a | 306 | |
5a71ae30 | 307 | static int netvsc_connect_vsp(struct hv_device *device) |
fceaf24a | 308 | { |
35abb21a | 309 | int ret, t; |
85799a37 HZ |
310 | struct netvsc_device *net_device; |
311 | struct nvsp_message *init_packet; | |
312 | int ndis_version; | |
fceaf24a | 313 | |
5a71ae30 | 314 | net_device = get_outbound_net_device(device); |
85799a37 | 315 | if (!net_device) { |
eb335bc4 | 316 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 317 | "device being destroyed?"); |
0f48c72c | 318 | return -ENODEV; |
fceaf24a HJ |
319 | } |
320 | ||
53d21fdb | 321 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 322 | |
85799a37 | 323 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb HZ |
324 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
325 | init_packet->msg.init_msg.init.min_protocol_ver = | |
85799a37 | 326 | NVSP_MIN_PROTOCOL_VERSION; |
53d21fdb | 327 | init_packet->msg.init_msg.init.max_protocol_ver = |
85799a37 | 328 | NVSP_MAX_PROTOCOL_VERSION; |
fceaf24a | 329 | |
454f18a9 | 330 | /* Send the init request */ |
85799a37 | 331 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 332 | sizeof(struct nvsp_message), |
85799a37 | 333 | (unsigned long)init_packet, |
415f2287 | 334 | VM_PKT_DATA_INBAND, |
5a4df290 | 335 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 336 | |
b8a3d52b | 337 | if (ret != 0) |
0c3b7b2f | 338 | goto cleanup; |
fceaf24a | 339 | |
5c5781b3 | 340 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a S |
341 | |
342 | if (t == 0) { | |
0c3b7b2f S |
343 | ret = -ETIMEDOUT; |
344 | goto cleanup; | |
345 | } | |
fceaf24a | 346 | |
53d21fdb HZ |
347 | if (init_packet->msg.init_msg.init_complete.status != |
348 | NVSP_STAT_SUCCESS) { | |
0f48c72c | 349 | ret = -EINVAL; |
0c3b7b2f | 350 | goto cleanup; |
fceaf24a HJ |
351 | } |
352 | ||
53d21fdb HZ |
353 | if (init_packet->msg.init_msg.init_complete. |
354 | negotiated_protocol_ver != NVSP_PROTOCOL_VERSION_1) { | |
0f48c72c | 355 | ret = -EPROTO; |
0c3b7b2f | 356 | goto cleanup; |
fceaf24a | 357 | } |
454f18a9 | 358 | /* Send the ndis version */ |
85799a37 | 359 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 360 | |
85799a37 | 361 | ndis_version = 0x00050000; |
fceaf24a | 362 | |
53d21fdb HZ |
363 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
364 | init_packet->msg.v1_msg. | |
365 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 366 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
367 | init_packet->msg.v1_msg. |
368 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 369 | ndis_version & 0xFFFF; |
fceaf24a | 370 | |
454f18a9 | 371 | /* Send the init request */ |
85799a37 | 372 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
373 | sizeof(struct nvsp_message), |
374 | (unsigned long)init_packet, | |
375 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 376 | if (ret != 0) |
0c3b7b2f | 377 | goto cleanup; |
454f18a9 BP |
378 | |
379 | /* Post the big receive buffer to NetVSP */ | |
5a71ae30 | 380 | ret = netvsc_init_recv_buf(device); |
fceaf24a | 381 | |
0c3b7b2f | 382 | cleanup: |
5a71ae30 | 383 | put_net_device(device); |
fceaf24a HJ |
384 | return ret; |
385 | } | |
386 | ||
648dc598 | 387 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 388 | { |
5a71ae30 | 389 | netvsc_destroy_recv_buf(net_device); |
fceaf24a HJ |
390 | } |
391 | ||
3e189519 | 392 | /* |
5a71ae30 | 393 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 394 | */ |
905620d1 | 395 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 396 | { |
85799a37 HZ |
397 | struct netvsc_device *net_device; |
398 | struct hv_netvsc_packet *netvsc_packet, *pos; | |
fceaf24a | 399 | |
454f18a9 | 400 | /* Stop outbound traffic ie sends and receives completions */ |
5a71ae30 | 401 | net_device = release_outbound_net_device(device); |
85799a37 | 402 | if (!net_device) { |
eb335bc4 | 403 | dev_err(&device->device, "No net device present!!"); |
ff2bd69a | 404 | return -ENODEV; |
fceaf24a HJ |
405 | } |
406 | ||
454f18a9 | 407 | /* Wait for all send completions */ |
53d21fdb | 408 | while (atomic_read(&net_device->num_outstanding_sends)) { |
eb335bc4 HJ |
409 | dev_err(&device->device, |
410 | "waiting for %d requests to complete...", | |
411 | atomic_read(&net_device->num_outstanding_sends)); | |
b4362c9c | 412 | udelay(100); |
fceaf24a HJ |
413 | } |
414 | ||
648dc598 | 415 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 416 | |
454f18a9 | 417 | /* Stop inbound traffic ie receives and sends completions */ |
5a71ae30 | 418 | net_device = release_inbound_net_device(device); |
fceaf24a | 419 | |
454f18a9 | 420 | /* At this point, no one should be accessing netDevice except in here */ |
eb335bc4 | 421 | dev_notice(&device->device, "net device safe to remove"); |
fceaf24a | 422 | |
454f18a9 | 423 | /* Now, we can close the channel safely */ |
85799a37 | 424 | vmbus_close(device->channel); |
fceaf24a | 425 | |
454f18a9 | 426 | /* Release all resources */ |
85799a37 | 427 | list_for_each_entry_safe(netvsc_packet, pos, |
53d21fdb | 428 | &net_device->recv_pkt_list, list_ent) { |
72a2f5bd | 429 | list_del(&netvsc_packet->list_ent); |
85799a37 | 430 | kfree(netvsc_packet); |
fceaf24a HJ |
431 | } |
432 | ||
356c4657 | 433 | kfree(net_device); |
21a80820 | 434 | return 0; |
fceaf24a HJ |
435 | } |
436 | ||
5a71ae30 | 437 | static void netvsc_send_completion(struct hv_device *device, |
85799a37 | 438 | struct vmpacket_descriptor *packet) |
fceaf24a | 439 | { |
85799a37 HZ |
440 | struct netvsc_device *net_device; |
441 | struct nvsp_message *nvsp_packet; | |
442 | struct hv_netvsc_packet *nvsc_packet; | |
fceaf24a | 443 | |
5a71ae30 | 444 | net_device = get_inbound_net_device(device); |
85799a37 | 445 | if (!net_device) { |
eb335bc4 | 446 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 447 | "device being destroyed?"); |
fceaf24a HJ |
448 | return; |
449 | } | |
450 | ||
85799a37 | 451 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 452 | (packet->offset8 << 3)); |
fceaf24a | 453 | |
53d21fdb HZ |
454 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
455 | (nvsp_packet->hdr.msg_type == | |
456 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
457 | (nvsp_packet->hdr.msg_type == | |
458 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) { | |
454f18a9 | 459 | /* Copy the response back */ |
53d21fdb | 460 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 461 | sizeof(struct nvsp_message)); |
35abb21a | 462 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
463 | } else if (nvsp_packet->hdr.msg_type == |
464 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
454f18a9 | 465 | /* Get the send context */ |
85799a37 | 466 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 467 | packet->trans_id; |
fceaf24a | 468 | |
454f18a9 | 469 | /* Notify the layer above us */ |
72a2f5bd HZ |
470 | nvsc_packet->completion.send.send_completion( |
471 | nvsc_packet->completion.send.send_completion_ctx); | |
fceaf24a | 472 | |
53d21fdb | 473 | atomic_dec(&net_device->num_outstanding_sends); |
21a80820 | 474 | } else { |
eb335bc4 | 475 | dev_err(&device->device, "Unknown send completion packet type- " |
53d21fdb | 476 | "%d received!!", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
477 | } |
478 | ||
5a71ae30 | 479 | put_net_device(device); |
fceaf24a HJ |
480 | } |
481 | ||
f9819f05 | 482 | int netvsc_send(struct hv_device *device, |
85799a37 | 483 | struct hv_netvsc_packet *packet) |
fceaf24a | 484 | { |
85799a37 | 485 | struct netvsc_device *net_device; |
21a80820 | 486 | int ret = 0; |
fceaf24a | 487 | |
223c1aa6 | 488 | struct nvsp_message sendMessage; |
fceaf24a | 489 | |
5a71ae30 | 490 | net_device = get_outbound_net_device(device); |
85799a37 | 491 | if (!net_device) { |
eb335bc4 | 492 | dev_err(&device->device, "net device (%p) shutting down..." |
85799a37 | 493 | "ignoring outbound packets", net_device); |
ff2bd69a | 494 | return -ENODEV; |
fceaf24a HJ |
495 | } |
496 | ||
53d21fdb | 497 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 498 | if (packet->is_data_pkt) { |
21a80820 | 499 | /* 0 is RMC_DATA; */ |
53d21fdb | 500 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
501 | } else { |
502 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 503 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 504 | } |
fceaf24a | 505 | |
454f18a9 | 506 | /* Not using send buffer section */ |
53d21fdb HZ |
507 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
508 | 0xFFFFFFFF; | |
509 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
21a80820 | 510 | |
72a2f5bd | 511 | if (packet->page_buf_cnt) { |
85799a37 | 512 | ret = vmbus_sendpacket_pagebuffer(device->channel, |
72a2f5bd HZ |
513 | packet->page_buf, |
514 | packet->page_buf_cnt, | |
ff3f8eec GKH |
515 | &sendMessage, |
516 | sizeof(struct nvsp_message), | |
85799a37 | 517 | (unsigned long)packet); |
21a80820 | 518 | } else { |
85799a37 | 519 | ret = vmbus_sendpacket(device->channel, &sendMessage, |
e4d59ac5 HZ |
520 | sizeof(struct nvsp_message), |
521 | (unsigned long)packet, | |
522 | VM_PKT_DATA_INBAND, | |
523 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
524 | |
525 | } | |
526 | ||
527 | if (ret != 0) | |
eb335bc4 | 528 | dev_err(&device->device, "Unable to send packet %p ret %d", |
85799a37 | 529 | packet, ret); |
fceaf24a | 530 | |
53d21fdb | 531 | atomic_inc(&net_device->num_outstanding_sends); |
5a71ae30 | 532 | put_net_device(device); |
fceaf24a HJ |
533 | return ret; |
534 | } | |
535 | ||
5fa9d3c5 HZ |
536 | static void netvsc_send_recv_completion(struct hv_device *device, |
537 | u64 transaction_id) | |
538 | { | |
539 | struct nvsp_message recvcompMessage; | |
540 | int retries = 0; | |
541 | int ret; | |
542 | ||
543 | recvcompMessage.hdr.msg_type = | |
544 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
545 | ||
546 | /* FIXME: Pass in the status */ | |
547 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = | |
548 | NVSP_STAT_SUCCESS; | |
549 | ||
550 | retry_send_cmplt: | |
551 | /* Send the completion */ | |
552 | ret = vmbus_sendpacket(device->channel, &recvcompMessage, | |
553 | sizeof(struct nvsp_message), transaction_id, | |
554 | VM_PKT_COMP, 0); | |
555 | if (ret == 0) { | |
556 | /* success */ | |
557 | /* no-op */ | |
d2598f01 | 558 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
559 | /* no more room...wait a bit and attempt to retry 3 times */ |
560 | retries++; | |
561 | dev_err(&device->device, "unable to send receive completion pkt" | |
562 | " (tid %llx)...retrying %d", transaction_id, retries); | |
563 | ||
564 | if (retries < 4) { | |
565 | udelay(100); | |
566 | goto retry_send_cmplt; | |
567 | } else { | |
568 | dev_err(&device->device, "unable to send receive " | |
569 | "completion pkt (tid %llx)...give up retrying", | |
570 | transaction_id); | |
571 | } | |
572 | } else { | |
573 | dev_err(&device->device, "unable to send receive " | |
574 | "completion pkt - %llx", transaction_id); | |
575 | } | |
576 | } | |
577 | ||
57991156 HZ |
578 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
579 | static void netvsc_receive_completion(void *context) | |
580 | { | |
581 | struct hv_netvsc_packet *packet = context; | |
582 | struct hv_device *device = (struct hv_device *)packet->device; | |
583 | struct netvsc_device *net_device; | |
584 | u64 transaction_id = 0; | |
585 | bool fsend_receive_comp = false; | |
586 | unsigned long flags; | |
587 | ||
588 | /* | |
589 | * Even though it seems logical to do a GetOutboundNetDevice() here to | |
590 | * send out receive completion, we are using GetInboundNetDevice() | |
591 | * since we may have disable outbound traffic already. | |
592 | */ | |
593 | net_device = get_inbound_net_device(device); | |
594 | if (!net_device) { | |
595 | dev_err(&device->device, "unable to get net device..." | |
596 | "device being destroyed?"); | |
597 | return; | |
598 | } | |
599 | ||
600 | /* Overloading use of the lock. */ | |
601 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); | |
602 | ||
603 | packet->xfer_page_pkt->count--; | |
604 | ||
605 | /* | |
606 | * Last one in the line that represent 1 xfer page packet. | |
607 | * Return the xfer page packet itself to the freelist | |
608 | */ | |
609 | if (packet->xfer_page_pkt->count == 0) { | |
610 | fsend_receive_comp = true; | |
611 | transaction_id = packet->completion.recv.recv_completion_tid; | |
612 | list_add_tail(&packet->xfer_page_pkt->list_ent, | |
613 | &net_device->recv_pkt_list); | |
614 | ||
615 | } | |
616 | ||
617 | /* Put the packet back */ | |
618 | list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); | |
619 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); | |
620 | ||
621 | /* Send a receive completion for the xfer page packet */ | |
622 | if (fsend_receive_comp) | |
623 | netvsc_send_recv_completion(device, transaction_id); | |
624 | ||
625 | put_net_device(device); | |
626 | } | |
627 | ||
5a71ae30 | 628 | static void netvsc_receive(struct hv_device *device, |
85799a37 | 629 | struct vmpacket_descriptor *packet) |
fceaf24a | 630 | { |
85799a37 HZ |
631 | struct netvsc_device *net_device; |
632 | struct vmtransfer_page_packet_header *vmxferpage_packet; | |
633 | struct nvsp_message *nvsp_packet; | |
634 | struct hv_netvsc_packet *netvsc_packet = NULL; | |
c4b0bc94 | 635 | unsigned long start; |
85799a37 | 636 | unsigned long end, end_virtual; |
7e23a6e9 | 637 | /* struct netvsc_driver *netvscDriver; */ |
85799a37 | 638 | struct xferpage_packet *xferpage_packet = NULL; |
21a80820 | 639 | int i, j; |
85799a37 | 640 | int count = 0, bytes_remain = 0; |
6436873a | 641 | unsigned long flags; |
779b4d17 | 642 | |
d29274ef | 643 | LIST_HEAD(listHead); |
fceaf24a | 644 | |
5a71ae30 | 645 | net_device = get_inbound_net_device(device); |
85799a37 | 646 | if (!net_device) { |
eb335bc4 | 647 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 648 | "device being destroyed?"); |
fceaf24a HJ |
649 | return; |
650 | } | |
651 | ||
21a80820 GKH |
652 | /* |
653 | * All inbound packets other than send completion should be xfer page | |
654 | * packet | |
655 | */ | |
415f2287 | 656 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
eb335bc4 | 657 | dev_err(&device->device, "Unknown packet type received - %d", |
415f2287 | 658 | packet->type); |
5a71ae30 | 659 | put_net_device(device); |
fceaf24a HJ |
660 | return; |
661 | } | |
662 | ||
85799a37 | 663 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 664 | (packet->offset8 << 3)); |
fceaf24a | 665 | |
454f18a9 | 666 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
667 | if (nvsp_packet->hdr.msg_type != |
668 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
eb335bc4 HJ |
669 | dev_err(&device->device, "Unknown nvsp packet type received-" |
670 | " %d", nvsp_packet->hdr.msg_type); | |
5a71ae30 | 671 | put_net_device(device); |
fceaf24a HJ |
672 | return; |
673 | } | |
674 | ||
85799a37 | 675 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 676 | |
415f2287 | 677 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
eb335bc4 | 678 | dev_err(&device->device, "Invalid xfer page set id - " |
21a80820 | 679 | "expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 680 | vmxferpage_packet->xfer_pageset_id); |
5a71ae30 | 681 | put_net_device(device); |
fceaf24a HJ |
682 | return; |
683 | } | |
684 | ||
454f18a9 BP |
685 | /* |
686 | * Grab free packets (range count + 1) to represent this xfer | |
687 | * page packet. +1 to represent the xfer page packet itself. | |
688 | * We grab it here so that we know exactly how many we can | |
689 | * fulfil | |
690 | */ | |
53d21fdb HZ |
691 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
692 | while (!list_empty(&net_device->recv_pkt_list)) { | |
693 | list_move_tail(net_device->recv_pkt_list.next, &listHead); | |
415f2287 | 694 | if (++count == vmxferpage_packet->range_cnt + 1) |
fceaf24a HJ |
695 | break; |
696 | } | |
53d21fdb | 697 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 698 | |
454f18a9 BP |
699 | /* |
700 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
701 | * page and at least 1 for the range) i.e. we can handled | |
702 | * some of the xfer page packet ranges... | |
703 | */ | |
21a80820 | 704 | if (count < 2) { |
eb335bc4 HJ |
705 | dev_err(&device->device, "Got only %d netvsc pkt...needed " |
706 | "%d pkts. Dropping this xfer page packet completely!", | |
707 | count, vmxferpage_packet->range_cnt + 1); | |
fceaf24a | 708 | |
454f18a9 | 709 | /* Return it to the freelist */ |
53d21fdb | 710 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
21a80820 | 711 | for (i = count; i != 0; i--) { |
92ec0893 | 712 | list_move_tail(listHead.next, |
53d21fdb | 713 | &net_device->recv_pkt_list); |
fceaf24a | 714 | } |
53d21fdb | 715 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, |
21a80820 | 716 | flags); |
fceaf24a | 717 | |
5a71ae30 | 718 | netvsc_send_recv_completion(device, |
415f2287 | 719 | vmxferpage_packet->d.trans_id); |
fceaf24a | 720 | |
5a71ae30 | 721 | put_net_device(device); |
fceaf24a HJ |
722 | return; |
723 | } | |
724 | ||
454f18a9 | 725 | /* Remove the 1st packet to represent the xfer page packet itself */ |
85799a37 | 726 | xferpage_packet = (struct xferpage_packet *)listHead.next; |
72a2f5bd | 727 | list_del(&xferpage_packet->list_ent); |
d29274ef | 728 | |
21a80820 | 729 | /* This is how much we can satisfy */ |
72a2f5bd | 730 | xferpage_packet->count = count - 1; |
21a80820 | 731 | |
415f2287 | 732 | if (xferpage_packet->count != vmxferpage_packet->range_cnt) { |
eb335bc4 HJ |
733 | dev_err(&device->device, "Needed %d netvsc pkts to satisy " |
734 | "this xfer page...got %d", | |
735 | vmxferpage_packet->range_cnt, xferpage_packet->count); | |
fceaf24a HJ |
736 | } |
737 | ||
454f18a9 | 738 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 739 | for (i = 0; i < (count - 1); i++) { |
85799a37 | 740 | netvsc_packet = (struct hv_netvsc_packet *)listHead.next; |
72a2f5bd | 741 | list_del(&netvsc_packet->list_ent); |
fceaf24a | 742 | |
454f18a9 | 743 | /* Initialize the netvsc packet */ |
72a2f5bd HZ |
744 | netvsc_packet->xfer_page_pkt = xferpage_packet; |
745 | netvsc_packet->completion.recv.recv_completion = | |
5a71ae30 | 746 | netvsc_receive_completion; |
72a2f5bd | 747 | netvsc_packet->completion.recv.recv_completion_ctx = |
85799a37 | 748 | netvsc_packet; |
72a2f5bd | 749 | netvsc_packet->device = device; |
21a80820 | 750 | /* Save this so that we can send it back */ |
72a2f5bd | 751 | netvsc_packet->completion.recv.recv_completion_tid = |
415f2287 | 752 | vmxferpage_packet->d.trans_id; |
fceaf24a | 753 | |
72a2f5bd | 754 | netvsc_packet->total_data_buflen = |
415f2287 | 755 | vmxferpage_packet->ranges[i].byte_count; |
72a2f5bd | 756 | netvsc_packet->page_buf_cnt = 1; |
fceaf24a | 757 | |
ca623ad3 | 758 | netvsc_packet->page_buf[0].len = |
415f2287 | 759 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 760 | |
85799a37 | 761 | start = virt_to_phys((void *)((unsigned long)net_device-> |
415f2287 | 762 | recv_buf + vmxferpage_packet->ranges[i].byte_offset)); |
fceaf24a | 763 | |
ca623ad3 | 764 | netvsc_packet->page_buf[0].pfn = start >> PAGE_SHIFT; |
53d21fdb | 765 | end_virtual = (unsigned long)net_device->recv_buf |
415f2287 HZ |
766 | + vmxferpage_packet->ranges[i].byte_offset |
767 | + vmxferpage_packet->ranges[i].byte_count - 1; | |
85799a37 | 768 | end = virt_to_phys((void *)end_virtual); |
fceaf24a | 769 | |
454f18a9 | 770 | /* Calculate the page relative offset */ |
ca623ad3 | 771 | netvsc_packet->page_buf[0].offset = |
415f2287 | 772 | vmxferpage_packet->ranges[i].byte_offset & |
85799a37 | 773 | (PAGE_SIZE - 1); |
21a80820 GKH |
774 | if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) { |
775 | /* Handle frame across multiple pages: */ | |
ca623ad3 HZ |
776 | netvsc_packet->page_buf[0].len = |
777 | (netvsc_packet->page_buf[0].pfn << | |
85799a37 | 778 | PAGE_SHIFT) |
21a80820 | 779 | + PAGE_SIZE - start; |
72a2f5bd | 780 | bytes_remain = netvsc_packet->total_data_buflen - |
ca623ad3 | 781 | netvsc_packet->page_buf[0].len; |
21a80820 | 782 | for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) { |
ca623ad3 | 783 | netvsc_packet->page_buf[j].offset = 0; |
85799a37 | 784 | if (bytes_remain <= PAGE_SIZE) { |
ca623ad3 | 785 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
786 | bytes_remain; |
787 | bytes_remain = 0; | |
21a80820 | 788 | } else { |
ca623ad3 | 789 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
790 | PAGE_SIZE; |
791 | bytes_remain -= PAGE_SIZE; | |
21a80820 | 792 | } |
ca623ad3 | 793 | netvsc_packet->page_buf[j].pfn = |
85799a37 HZ |
794 | virt_to_phys((void *)(end_virtual - |
795 | bytes_remain)) >> PAGE_SHIFT; | |
72a2f5bd | 796 | netvsc_packet->page_buf_cnt++; |
85799a37 | 797 | if (bytes_remain == 0) |
21a80820 | 798 | break; |
fceaf24a | 799 | } |
fceaf24a | 800 | } |
fceaf24a | 801 | |
454f18a9 | 802 | /* Pass it to the upper layer */ |
ac6f7859 | 803 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 804 | |
5a71ae30 | 805 | netvsc_receive_completion(netvsc_packet-> |
72a2f5bd | 806 | completion.recv.recv_completion_ctx); |
fceaf24a HJ |
807 | } |
808 | ||
5a71ae30 | 809 | put_net_device(device); |
fceaf24a HJ |
810 | } |
811 | ||
5a71ae30 | 812 | static void netvsc_channel_cb(void *context) |
fceaf24a | 813 | { |
21a80820 | 814 | int ret; |
85799a37 HZ |
815 | struct hv_device *device = context; |
816 | struct netvsc_device *net_device; | |
817 | u32 bytes_recvd; | |
818 | u64 request_id; | |
c6fcf0ba | 819 | unsigned char *packet; |
8dc0a06a | 820 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
821 | unsigned char *buffer; |
822 | int bufferlen = NETVSC_PACKET_SIZE; | |
fceaf24a | 823 | |
c6fcf0ba | 824 | packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char), |
d70c6731 | 825 | GFP_ATOMIC); |
c6fcf0ba BP |
826 | if (!packet) |
827 | return; | |
828 | buffer = packet; | |
829 | ||
5a71ae30 | 830 | net_device = get_inbound_net_device(device); |
85799a37 | 831 | if (!net_device) { |
eb335bc4 | 832 | dev_err(&device->device, "net device (%p) shutting down..." |
85799a37 | 833 | "ignoring inbound packets", net_device); |
c6fcf0ba | 834 | goto out; |
fceaf24a HJ |
835 | } |
836 | ||
21a80820 | 837 | do { |
9f630068 | 838 | ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, |
85799a37 | 839 | &bytes_recvd, &request_id); |
21a80820 | 840 | if (ret == 0) { |
85799a37 | 841 | if (bytes_recvd > 0) { |
21a80820 | 842 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
843 | switch (desc->type) { |
844 | case VM_PKT_COMP: | |
5a71ae30 | 845 | netvsc_send_completion(device, desc); |
21a80820 GKH |
846 | break; |
847 | ||
415f2287 | 848 | case VM_PKT_DATA_USING_XFER_PAGES: |
5a71ae30 | 849 | netvsc_receive(device, desc); |
21a80820 GKH |
850 | break; |
851 | ||
852 | default: | |
eb335bc4 | 853 | dev_err(&device->device, |
21a80820 GKH |
854 | "unhandled packet type %d, " |
855 | "tid %llx len %d\n", | |
415f2287 | 856 | desc->type, request_id, |
85799a37 | 857 | bytes_recvd); |
21a80820 | 858 | break; |
fceaf24a HJ |
859 | } |
860 | ||
454f18a9 | 861 | /* reset */ |
c6fcf0ba | 862 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 863 | kfree(buffer); |
fceaf24a | 864 | buffer = packet; |
c6fcf0ba | 865 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a | 866 | } |
21a80820 | 867 | } else { |
454f18a9 | 868 | /* reset */ |
c6fcf0ba | 869 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 870 | kfree(buffer); |
fceaf24a | 871 | buffer = packet; |
c6fcf0ba | 872 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a HJ |
873 | } |
874 | ||
875 | break; | |
876 | } | |
3d5cad97 | 877 | } else if (ret == -ENOBUFS) { |
21a80820 | 878 | /* Handle large packet */ |
85799a37 | 879 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 880 | if (buffer == NULL) { |
454f18a9 | 881 | /* Try again next time around */ |
eb335bc4 | 882 | dev_err(&device->device, |
21a80820 | 883 | "unable to allocate buffer of size " |
85799a37 | 884 | "(%d)!!", bytes_recvd); |
fceaf24a HJ |
885 | break; |
886 | } | |
887 | ||
85799a37 | 888 | bufferlen = bytes_recvd; |
fceaf24a HJ |
889 | } |
890 | } while (1); | |
891 | ||
5a71ae30 | 892 | put_net_device(device); |
c6fcf0ba BP |
893 | out: |
894 | kfree(buffer); | |
fceaf24a HJ |
895 | return; |
896 | } | |
af24ce42 | 897 | |
b637e023 HZ |
898 | /* |
899 | * netvsc_device_add - Callback when the device belonging to this | |
900 | * driver is added | |
901 | */ | |
7bd23a4d | 902 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
903 | { |
904 | int ret = 0; | |
905 | int i; | |
aae23986 S |
906 | int ring_size = |
907 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 HZ |
908 | struct netvsc_device *net_device; |
909 | struct hv_netvsc_packet *packet, *pos; | |
b637e023 HZ |
910 | |
911 | net_device = alloc_net_device(device); | |
912 | if (!net_device) { | |
ace163a8 | 913 | ret = -ENOMEM; |
b637e023 HZ |
914 | goto cleanup; |
915 | } | |
916 | ||
917 | /* Initialize the NetVSC channel extension */ | |
918 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
919 | spin_lock_init(&net_device->recv_pkt_list_lock); | |
920 | ||
b637e023 HZ |
921 | INIT_LIST_HEAD(&net_device->recv_pkt_list); |
922 | ||
923 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { | |
924 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + | |
925 | (NETVSC_RECEIVE_SG_COUNT * | |
926 | sizeof(struct hv_page_buffer)), GFP_KERNEL); | |
927 | if (!packet) | |
928 | break; | |
929 | ||
930 | list_add_tail(&packet->list_ent, | |
931 | &net_device->recv_pkt_list); | |
932 | } | |
35abb21a | 933 | init_completion(&net_device->channel_init_wait); |
b637e023 HZ |
934 | |
935 | /* Open the channel */ | |
aae23986 S |
936 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
937 | ring_size * PAGE_SIZE, NULL, 0, | |
b637e023 HZ |
938 | netvsc_channel_cb, device); |
939 | ||
940 | if (ret != 0) { | |
941 | dev_err(&device->device, "unable to open channel: %d", ret); | |
b637e023 HZ |
942 | goto cleanup; |
943 | } | |
944 | ||
945 | /* Channel is opened */ | |
946 | pr_info("hv_netvsc channel opened successfully"); | |
947 | ||
948 | /* Connect with the NetVsp */ | |
949 | ret = netvsc_connect_vsp(device); | |
950 | if (ret != 0) { | |
951 | dev_err(&device->device, | |
952 | "unable to connect to NetVSP - %d", ret); | |
b637e023 HZ |
953 | goto close; |
954 | } | |
955 | ||
956 | return ret; | |
957 | ||
958 | close: | |
959 | /* Now, we can close the channel safely */ | |
960 | vmbus_close(device->channel); | |
961 | ||
962 | cleanup: | |
963 | ||
964 | if (net_device) { | |
965 | list_for_each_entry_safe(packet, pos, | |
966 | &net_device->recv_pkt_list, | |
967 | list_ent) { | |
968 | list_del(&packet->list_ent); | |
969 | kfree(packet); | |
970 | } | |
971 | ||
972 | release_outbound_net_device(device); | |
973 | release_inbound_net_device(device); | |
974 | ||
356c4657 | 975 | kfree(net_device); |
b637e023 HZ |
976 | } |
977 | ||
978 | return ret; | |
979 | } |